Glue brush



FIG. 1 is a perspective view of the glue brush.

FIG. 2 is a side plan view thereof, the sides being symmetric.

FIG. 3 is a top plan view thereof.

FIG. 4 is a bottom plan view thereof.

FIG. 5 is a front end plan view thereof looking into bristles; and,

FIG. 6 is a back end plan view thereof.

CLAIM The ornamental design for a glue brush, as shown and described.